class_docstr: MovingMnist Dataset.
code: def map_fn(self, image, label):
      sequence = moving_sequence.image_as_moving_sequence(
          image, sequence_length=20
      )
      return sequence.image_sequence
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import numpy
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import video_utils
  from tensor2tensor.layers import modalities
  from tensor2tensor.utils import contrib
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
  import tensorflow_datasets
  from tensorflow_datasets.video import moving_sequence
label_desc: Use image node_id 12 for calling the VideoMovingMnist obj's underlying member method code with example usage: obj.map_fn(image, label) and returns: sequence